CN104843707A - Calcium carbide furnace and method for manufacturing calcium carbide by utilization of calcium carbide furnace - Google Patents
Calcium carbide furnace and method for manufacturing calcium carbide by utilization of calcium carbide furnace Download PDFInfo
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- CN104843707A CN104843707A CN201510188620.7A CN201510188620A CN104843707A CN 104843707 A CN104843707 A CN 104843707A CN 201510188620 A CN201510188620 A CN 201510188620A CN 104843707 A CN104843707 A CN 104843707A
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Abstract
The invention brings forward a calcium carbide furnace and a method for manufacturing calcium carbide by the utilization of the calcium carbide furnace. The calcium carbide furnace comprises a pyrolyzing furnace body, an electric furnace bottom, a pellet material inlet, a pyrolysis gas outlet and a calcium carbide liquor outlet. There is a pyrolysis cavity inside the pyrolyzing furnace body. The electric furnace bottom has a calcium carbide production cavity. The electric furnace bottom has a heating device. The top of the electric furnace bottom is connected with the lower end of the pyrolyzing furnace body such that the pyrolysis cavity is communicated with the calcium carbide production cavity. The pellet material inlet is arranged at the top of the pyrolyzing furnace body such that it is convenient to add a pellet material containing pulverized coal and lime into the pyrolysis cavity through the top of the pyrolyzing furnace body. The pyrolysis gas outlet is disposed on the upper part of the pyrolyzing furnace body. The calcium carbide liquor outlet is mounted on the lower part of the electric furnace bottom. By the adoption of the calcium carbide furnace, energy consumption can be remarkably reduced, and preparation efficiency of calcium carbide can be raised.
Description
Technical field
The invention belongs to calcium carbide production field, specifically, the present invention relates to furnace of calcium carbide and utilize this furnace of calcium carbide to prepare the method for calcium carbide.
Background technology
Along with the development of modern industry, calcium carbide industry and organic synthesis industry are closely connected, particularly PVC Industry, and the PVC (polyvinyl chloride) of China more than 70% produces and comes from carbide acetylene.Due to Market Reasons, calcium carbide is sold and is affected, and therefore how to reduce the bottleneck that calcium carbide production cost becomes calcium carbide industry development.
Current traditional calcium carbide production technique, the unslaked lime that the production of calcium carbide uses block granular always and carbon materials react and generate calcium carbide more than 2000 DEG C, high energy consumption, high cost, and energy consumption height is because block stock specific surface area is little, making needs comparatively high temps just can complete reaction.Have research display, reduce raw material granularity, calcium carbide smelting temperature can be reduced to about 1700 DEG C.Therefore, the reduction of raw material particle size, is conducive to reducing temperature of reaction, reduces energy consumption.Meanwhile, the blue charcoal of traditional electrical stone process selection quality block and lime, the blue charcoal of powdery and lime have to process at a low price, indirectly increase calcium carbide production cost.
Summary of the invention
The present invention is intended to solve one of technical problem in correlation technique at least to a certain extent.For this reason, one object of the present invention is propose a kind of furnace of calcium carbide and utilize this furnace of calcium carbide to prepare the method for calcium carbide.
According to an aspect of the present invention, the present invention proposes a kind of furnace of calcium carbide, comprising:
Pyrolysis shaft, has pyrolysis chamber in described pyrolysis shaft;
EAF bottom, described EAF bottom has calcium carbide and produces chamber, and described EAF bottom has heating unit, and the top of described EAF bottom is connected with the lower end of described pyrolysis shaft, so that described pyrolysis chamber and described calcium carbide produce chamber;
Pelletizing material inlet, described pelletizing material inlet is located at the top of described pyrolysis shaft, to add the pelletizing material containing fine coal and lime from the top of described pyrolysis shaft in described pyrolysis chamber;
Pyrolysis gas outlet, described pyrolysis gas outlet is located at the top of described pyrolysis shaft,
Carbide liquid exports, and described carbide liquid outlet is located at the bottom of described EAF bottom.
Thus, the furnace of calcium carbide of the above embodiment of the present invention has pyrolysis shaft and EAF bottom two sections, and then pyrolytic process and calcium carbide production technique is organically combined in a set of system for producing calcium carbide, achieves the integration of equipment.Wherein the pyrolysis chamber of epimere pyrolysis shaft and the calcium carbide of hypomere EAF bottom produce chamber, the calcium carbide raw materials for production of high-temperature tail gas to pyrolysis chamber of the indoor generation of the calcium carbide production chamber being positioned at hypomere can be utilized thus to carry out pyrolysis processing, achieve tail gas heat quantity to utilize, improve overall thermal efficiency.In addition, with the high-temp solid material of a large amount of sensible heat in pyrolysis chamber, directly enter calcium carbide production chamber indoor, distance is short, thermosteresis is little, effectively can reduce calcium carbide section energy consumption thus, and improve integrated artistic thermo-efficiency.
In addition, furnace of calcium carbide according to the above embodiment of the present invention can also have following additional technical characteristic:
In some embodiments of the invention, described heating unit is three-phase electrode.
In some embodiments of the invention, described carbide liquid outlet comprises multiple, and described multiple carbide liquid outlet is radially oppositely arranged.
In some embodiments of the invention, described pyrolysis shaft is connected by excessive portion with described EAF bottom, and the diameter in described excessive portion first reduces rear increase along the direction of charging.
According to a second aspect of the invention, the invention allows for a kind of method utilizing furnace of calcium carbide to prepare calcium carbide, comprising:
Add the pelletizing material containing fine coal and lime in described furnace of calcium carbide from described pelletizing material inlet, make described pyrolysis chamber and the described pelletizing material of the indoor filling of described calcium carbide production chamber;
Start the described pelletizing material of described heating unit to described calcium carbide production chamber indoor heat and calcium carbide smelting reaction occur, to obtain carbide liquid and to produce high-temperature tail gas;
Make described high-temperature tail gas upwards enter described pyrolysis chamber and pyrolysis processing is carried out to the described pelletizing material in described pyrolysis chamber; And
Described carbide liquid is discharged from described carbide liquid outlet;
In some embodiments of the invention, the temperature of described high-temperature tail gas is 600-1000 degree Celsius.
In some embodiments of the invention, described calcium carbide smelts reaction is carry out completing for 5-30 minute under 1750-2200 degree Celsius.
In some embodiments of the invention, described calcium carbide smelts reaction is carry out completing for 12 minutes under 1900 degrees Celsius.
In some embodiments of the invention, the fine coal in the described pelletizing material containing fine coal and lime is low order raw coal in powdery.
In some embodiments of the invention, the median size of described fine coal and lime is for being not more than 20 microns.
Accompanying drawing explanation
Fig. 1 is the structural representation of furnace of calcium carbide according to an embodiment of the invention.
Embodiment
The furnace of calcium carbide of the embodiment of the present invention is described in detail below with reference to Fig. 1.
Furnace of calcium carbide according to the embodiment of the present invention specifically comprises: pyrolysis shaft 10, EAF bottom 20, pelletizing material inlet 30, pyrolysis gas outlet 40 and carbide liquid outlet 50, wherein, has pyrolysis chamber 11 in pyrolysis shaft 10; EAF bottom 20 has calcium carbide and produces chamber 21, and EAF bottom 20 has heating unit 22, and the top of EAF bottom 20 is connected with the lower end of pyrolysis shaft 10, is communicated with so that pyrolysis chamber 11 and calcium carbide produce chamber 21; Pelletizing material inlet 30 is located at the top of pyrolysis shaft 10, to add the pelletizing material containing fine coal and lime from the top of pyrolysis shaft 10 in pyrolysis chamber 11; Pyrolysis gas outlet 40 is located at the top of pyrolysis shaft 10, and carbide liquid outlet 50 is located at the bottom of EAF bottom 20.
Thus, the furnace of calcium carbide of the above embodiment of the present invention has pyrolysis shaft 10 and EAF bottom 20 two sections, and then pyrolytic process and calcium carbide production technique is organically combined in a set of system for producing calcium carbide, achieves the integration of equipment.Wherein the pyrolysis chamber 11 of epimere pyrolysis shaft 10 is produced chamber 21 with the calcium carbide of hypomere EAF bottom 20 and is communicated with, the calcium carbide raw materials for production of high-temperature tail gas to pyrolysis chamber 11 that the calcium carbide being positioned at hypomere can be utilized thus to produce chamber 21 generation carry out pyrolysis processing, achieve tail gas heat quantity to utilize, improve overall thermal efficiency.In addition, with the high-temp solid material of a large amount of sensible heat in pyrolysis chamber 11, directly enter calcium carbide and produce in chamber 21, distance is short, thermosteresis is little, effectively can reduce calcium carbide section energy consumption thus, and improve integrated artistic thermo-efficiency.
According to a particular embodiment of the invention, the heating unit 22 in above-mentioned EAF bottom 20 can be three-phase electrode.Heating efficiency can be improved thus.According to a particular embodiment of the invention, the raw material producing generation calcium carbide reaction in chamber 21 owing to entering calcium carbide is through after pyrolysis chamber 11 pyrolysis, energy consumption in EAF bottom 20 can be reduced further thus, more than 2000 degrees Celsius temperature needed for traditional production calcium carbide can be down to 1750 degrees Celsius.
According to a particular embodiment of the invention, the carbide liquid outlet 50 being positioned at EAF bottom 20 bottom can comprise multiple, and multiple carbide liquid outlet is radially oppositely arranged.The efficiency of discharging calcium carbide can be improved thus.
According to a particular embodiment of the invention, pyrolysis shaft is connected by excessive portion with described EAF bottom, and the diameter in described excessive portion first reduces rear increase along the direction of charging.Material after can controlling pyrolysis thus enters the speed that calcium carbide produces chamber 21.Owing to producing in chamber at calcium carbide, three electrode central region temperature are the highest, and material is the fastest at middle part blanking velocity, therefore excessively portion's diameter first reduces rear increase along the direction of charging, and after can controlling pyrolysis on the one hand, material enters the speed of calcium carbide chamber; On the other hand, can make charging in the middle part of material after pyrolysis, material directly enters high-temperature zone, reacts, and weakens body of heater rim effect.
According to a further aspect in the invention, the invention allows for a kind of method utilizing furnace of calcium carbide noted earlier to prepare calcium carbide.According to a particular embodiment of the invention, the method comprises: add the pelletizing material containing fine coal and lime in furnace of calcium carbide from pelletizing material inlet, makes pyrolysis chamber and calcium carbide production chamber indoor filling pelletizing material; Start the pelletizing material of heating unit to calcium carbide production chamber indoor heat and calcium carbide smelting reaction occur, to obtain carbide liquid and to produce high-temperature tail gas; Make high-temperature tail gas upwards enter pyrolysis chamber and pyrolysis processing is carried out to the pelletizing material in pyrolysis chamber; And carbide liquid is discharged from carbide liquid outlet.
Thus, pyrolytic process and calcium carbide production technique organically combine by the method preparing calcium carbide of the above embodiment of the present invention, achieve the serialization of technique.The high-temperature tail gas wherein taking full advantage of calcium carbide smelting generation carries out pyrolysis processing to calcium carbide raw materials for production, achieves tail gas heat quantity complete utilization, improves overall thermal efficiency.In addition, with the high-temp solid material of a large amount of sensible heat after pyrolysis, directly enter calcium carbide production chamber indoor and smelt, distance is short, thermosteresis is little, effectively can reduce calcium carbide section energy consumption thus, and improve integrated artistic thermo-efficiency.
According to a particular embodiment of the invention, the temperature of the high-temperature tail gas of the indoor generation of calcium carbide production chamber is 600-1000 degree Celsius.Make full use of this high-temperature flue gas thus and pyrolysis processing is carried out to the pelletizing material before calcium carbide reaction.According to a particular embodiment of the invention, above-mentioned high-temperature flue gas is utilized to carry out pyrolysis processing to pelletizing material, can obtain artificial petroleum, artificial natural gas and pyrolysis solid product, wherein, pyrolysis solid product contains the one in unslaked lime and coke, semicoke, carbon black.What pyrolytic process made carbon back raw material contact with calcium based raw material thus is more tight, advantageously temperature and the tap to tap time of reducing subsequent smelting, and then significantly reduces production energy consumption.
According to a particular embodiment of the invention, above-mentioned calcium carbide smelts reaction is carry out completing for 5-30 minute under 1750-2200 degree Celsius.Can adopt thus the furnace of calcium carbide of the above embodiment of the present invention prepare calcium carbide can significantly reduce calcium carbide reaction temperature, Reaction time shorten, so save energy consumption.Preferably, calcium carbide smelts reaction is carry out completing for 12 minutes under 1900 degrees Celsius.
According to a particular embodiment of the invention, the fine coal in the described pelletizing material containing fine coal and lime is low order raw coal in powdery.The middle low order raw coal of powdery can be made full use of thus, and then can raw materials cost be reduced.
According to a particular embodiment of the invention, the median size of described fine coal and lime is not more than 20 microns, thus, by powdery carbon back raw material and calcium based raw material mixing moulding, greatly adds the contact area of two kinds of raw materials, calcium carbide smelting temperature is significantly reduced.According to a particular embodiment of the invention, be that the temperature of metallurgy can be down to 1750 degrees Celsius by the powdery carbon back raw material of 10 microns and calcium based raw material by choosing median size.More traditional smelting temperature preparing calcium carbide is 2000 ~ 2200 degrees Celsius and significantly reduces energy consumption.
In addition, powdery carbon back raw material and calcium based raw material are made pelletizing material by the present invention in advance, and then can make to discharge out of the furnace gas substantially without dust, raw material carries out pyrolytic reaction at pyrolysis section simultaneously, heat comes from the calcium carbide reaction end gas of hypomere, integrated artistic gaseous product composition is pure, tolerance is relatively less, economy is high, and subsequent purification unit burden is less.
Embodiment
Pyrolysis of coal is a kind ofly smelted with calcium carbide the furnace of calcium carbide combined by the present invention, and main body is divided into two sections: epimere is pyrolysis section, and hypomere is calcium carbide production section.
Epimere: be provided with pelletizing material inlet and pyrolysis gas outlet.After fine coal and lime are shaping according to a certain percentage, pelletizing material enters in epimere pyrolysis chamber along with the opening and closing of pelletizing material inlet, and pelletizing material moves down with action of gravity in stove.Destructive distillation thermal source comes from about the 900 DEG C high-temperature tail gas that hypomere calcium carbide production section produces, the coal gas that the pyrolysis of pelletizing material produces is discharged by the gas exit being positioned at two-stage furnace top, coal gas is by pelletizing material preheating zone, coal gas of high temperature is by the preheating of pelletizing material, and pelletizing material produces inherent filtration effect to dust in coal gas simultaneously.
Hypomere: the hot solids product after pyrolysis enters hypomere calcium carbide production section, calcium carbide production section adopts three-phase electrode, produce open arc heating raw, calcium carbide formation reaction can be there is in raw material under 1900 degree celsius temperature, 12 minutes reaction times, high-temperature tail gas is upwards as pyrolysis section thermal source, and liquid calcium carbide product is by the liquid discharging of bottom discharge port.Produce one ton of consumption of calcium carbide electric power 2850kwh, the time used needs 25 ~ 50min from being fed to carbide liquid outflow.
Two-part furnace of calcium carbide, organically combines pyrolytic process and calcium carbide production technique, achieves whole utilizations of powder raw material, powdery carbon materials combines with lime, the effective contact area of very big increase, reduces calcium carbide temperature of reaction, and can obtain by-product coke oil and gas.After pyrolysis, solid product is with a large amount of sensible heat, enters in hypomere furnace of calcium carbide, can significantly reduce furnace of calcium carbide energy consumption.Therefore calcium carbide produced by two-part furnace of calcium carbide, can significantly reduce furnace of calcium carbide energy consumption and production cost.
In traditional calcium carbide production technique, producing ton calcium carbide current consumption is 3200kwh, and producing the ton calcium carbide time is 40 ~ 60 minutes, and adopt above-mentioned two-part furnace of calcium carbide, producing ton calcium carbide current consumption is 2850kwh, reduces current consumption 350kwh, and producing the calcium carbide time is 25 ~ 50min.
In describing the invention, it will be appreciated that, term " " center ", " longitudinal direction ", " transverse direction ", " length ", " width ", " thickness ", " on ", D score, " front ", " afterwards ", " left side ", " right side ", " vertically ", " level ", " top ", " end " " interior ", " outward ", " clockwise ", " counterclockwise ", " axis ", " radial direction ", orientation or the position relationship of the instruction such as " circumference " are based on orientation shown in the drawings or position relationship, only the present invention for convenience of description and simplified characterization, instead of indicate or imply that the device of indication or element must have specific orientation, with specific azimuth configuration and operation, therefore limitation of the present invention can not be interpreted as.
In addition, term " first ", " second " only for describing object, and can not be interpreted as instruction or hint relative importance or imply the quantity indicating indicated technical characteristic.Thus, be limited with " first ", the feature of " second " can express or impliedly comprise one or more these features.In describing the invention, the implication of " multiple " is two or more, unless otherwise expressly limited specifically.
In the present invention, unless otherwise clearly defined and limited, the term such as term " installation ", " being connected ", " connection ", " fixing " should be interpreted broadly, and such as, can be fixedly connected with, also can be removably connect, or integral; Can be mechanical connection, also can be electrical connection; Can be directly be connected, also indirectly can be connected by intermediary, can be the connection of two element internals or the interaction relationship of two elements.For the ordinary skill in the art, above-mentioned term concrete meaning in the present invention can be understood as the case may be.
In the present invention, unless otherwise clearly defined and limited, fisrt feature second feature " on " or D score can be that the first and second features directly contact, or the first and second features are by intermediary indirect contact.And, fisrt feature second feature " on ", " top " and " above " but fisrt feature directly over second feature or oblique upper, or only represent that fisrt feature level height is higher than second feature.Fisrt feature second feature " under ", " below " and " below " can be fisrt feature immediately below second feature or tiltedly below, or only represent that fisrt feature level height is less than second feature.
In the description of this specification sheets, specific features, structure, material or feature that the description of reference term " embodiment ", " some embodiments ", " example ", " concrete example " or " some examples " etc. means to describe in conjunction with this embodiment or example are contained at least one embodiment of the present invention or example.In this manual, to the schematic representation of above-mentioned term need not for be identical embodiment or example.And the specific features of description, structure, material or feature can combine in one or more embodiment in office or example in an appropriate manner.In addition, when not conflicting, the feature of the different embodiment described in this specification sheets or example and different embodiment or example can carry out combining and combining by those skilled in the art.
Although illustrate and describe embodiments of the invention above, be understandable that, above-described embodiment is exemplary, can not be interpreted as limitation of the present invention, and those of ordinary skill in the art can change above-described embodiment within the scope of the invention, revises, replace and modification.
Claims (10)
1. a furnace of calcium carbide, is characterized in that, comprising:
Pyrolysis shaft, has pyrolysis chamber in described pyrolysis shaft;
EAF bottom, described EAF bottom has calcium carbide and produces chamber, and described EAF bottom has heating unit, and the top of described EAF bottom is connected with the lower end of described pyrolysis shaft, so that described pyrolysis chamber and described calcium carbide produce chamber;
Pelletizing material inlet, described pelletizing material inlet is located at the top of described pyrolysis shaft, to add the pelletizing material containing fine coal and lime from the top of described pyrolysis shaft in described pyrolysis chamber;
Pyrolysis gas outlet, described pyrolysis gas outlet is located at the top of described pyrolysis shaft;
Carbide liquid exports, and described carbide liquid outlet is located at the bottom of described EAF bottom.
2. furnace of calcium carbide according to claim 1, is characterized in that, described heating unit is three-phase electrode.
3. furnace of calcium carbide according to claim 1 and 2, is characterized in that, described carbide liquid outlet comprises multiple, and described multiple carbide liquid outlet is radially oppositely arranged.
4. the furnace of calcium carbide according to any one of claim 1-3, is characterized in that, described pyrolysis shaft is connected by excessive portion with described EAF bottom, and the diameter in described excessive portion first reduces rear increase along the direction of charging.
5. utilize furnace of calcium carbide described in any one of claim 1-4 to prepare the method for calcium carbide, it is characterized in that, comprising:
Add the pelletizing material containing fine coal and lime in described furnace of calcium carbide from described pelletizing material inlet, make described pyrolysis chamber and the described pelletizing material of the indoor filling of described calcium carbide production chamber;
Start the described pelletizing material of described heating unit to described calcium carbide production chamber indoor heat and calcium carbide smelting reaction occur, to obtain carbide liquid and to produce high-temperature tail gas;
Make described high-temperature tail gas upwards enter described pyrolysis chamber and pyrolysis processing is carried out to the described pelletizing material in described pyrolysis chamber; And
Described carbide liquid is discharged from described carbide liquid outlet.
6. prepare the method for calcium carbide according to claim 5, it is characterized in that, the temperature of described high-temperature tail gas is 600-1000 degree Celsius.
7. according to claim 5 or 6, prepare the method for calcium carbide, it is characterized in that, it is carry out completing for 5-30 minute under 1750-2200 degree Celsius that described calcium carbide smelts reaction.
8. prepare the method for calcium carbide according to claim 7, it is characterized in that, it is carry out completing for 12 minutes under 1900 degrees Celsius that described calcium carbide smelts reaction.
9. according to any one of claim 5-8, prepare the method for calcium carbide, it is characterized in that, the fine coal in the described pelletizing material containing fine coal and lime is low order raw coal in powdery.
10. according to any one of claim 5-9, prepare the method for calcium carbide, it is characterized in that, the median size of described fine coal and lime is for being not more than 20 microns.
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| CN201510188620.7A CN104843707B (en) | 2015-04-20 | 2015-04-20 | Furnace of calcium carbide and the method that calcium carbide is prepared using the furnace of calcium carbide |
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| CN201510188620.7A CN104843707B (en) | 2015-04-20 | 2015-04-20 | Furnace of calcium carbide and the method that calcium carbide is prepared using the furnace of calcium carbide |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105883809A (en) * | 2016-03-30 | 2016-08-24 | 神雾环保技术股份有限公司 | Calcium carbide furnace and method for preparing calcium carbide |
| CN105885978A (en) * | 2016-04-29 | 2016-08-24 | 神雾环保技术股份有限公司 | Briquette and calcium carbide preparation method and calcium carbide preparation system |
| CN106430203A (en) * | 2016-12-09 | 2017-02-22 | 神雾环保技术股份有限公司 | Calcium carbide smelting furnace |
| CN106430204A (en) * | 2016-12-09 | 2017-02-22 | 神雾环保技术股份有限公司 | Thermal treatment and oxygen thermal recovery integrated calcium carbide smelting furnace |
| CN106698431A (en) * | 2016-12-09 | 2017-05-24 | 神雾环保技术股份有限公司 | Carbon-thermal calcium carbide production equipment |
| CN107473225A (en) * | 2016-06-08 | 2017-12-15 | 神雾环保技术股份有限公司 | Prepare the system and method for calcium carbide |
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| CN103272536A (en) * | 2012-06-21 | 2013-09-04 | 北京化工大学 | Composite bed reactor and method for combined production of calcium carbide, gas and tar |
| CN204752218U (en) * | 2015-04-20 | 2015-11-11 | 北京神雾环境能源科技集团股份有限公司 | Carbide stove |
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| CN103272536A (en) * | 2012-06-21 | 2013-09-04 | 北京化工大学 | Composite bed reactor and method for combined production of calcium carbide, gas and tar |
| CN204752218U (en) * | 2015-04-20 | 2015-11-11 | 北京神雾环境能源科技集团股份有限公司 | Carbide stove |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105883809A (en) * | 2016-03-30 | 2016-08-24 | 神雾环保技术股份有限公司 | Calcium carbide furnace and method for preparing calcium carbide |
| CN105885978A (en) * | 2016-04-29 | 2016-08-24 | 神雾环保技术股份有限公司 | Briquette and calcium carbide preparation method and calcium carbide preparation system |
| CN107473225A (en) * | 2016-06-08 | 2017-12-15 | 神雾环保技术股份有限公司 | Prepare the system and method for calcium carbide |
| CN106430203A (en) * | 2016-12-09 | 2017-02-22 | 神雾环保技术股份有限公司 | Calcium carbide smelting furnace |
| CN106430204A (en) * | 2016-12-09 | 2017-02-22 | 神雾环保技术股份有限公司 | Thermal treatment and oxygen thermal recovery integrated calcium carbide smelting furnace |
| CN106698431A (en) * | 2016-12-09 | 2017-05-24 | 神雾环保技术股份有限公司 | Carbon-thermal calcium carbide production equipment |
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